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tinyidiot [2018/12/19 12:31] – created yairtinyidiot [2018/12/19 16:23] – [TinyIdiot] yair
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-TinyIdiot+====== TinyIdiot ====== 
  
 tinytony for esp8266 tinytony for esp8266
  
-drv8830 [[http://www.tij.co.jp/jp/lit/ds/symlink/drv8830.pdf|datasheet]] \\ +drv8830 [[http://www.ti.com/lit/ds/symlink/drv8830.pdf|datasheet]] \\ 
-built of work by sparkfun minimoto breakout [[https://jiwashin.blogspot.com/2016/09/drive-dc-motor-by-drv8830-and-esp8266.html|and jiwashin]] and [[https://makers-with-myson.blog.so-net.ne.jp/2014-05-15|here]]+built of work by sparkfun [[https://github.com/sparkfun/SparkFun_MiniMoto_Arduino_Library|minimoto]] breakout [[https://jiwashin.blogspot.com/2016/09/drive-dc-motor-by-drv8830-and-esp8266.html|and jiwashin]] and [[https://makers-with-myson.blog.so-net.ne.jp/2014-05-15|here]]
  
  
 {{:pasted:20181219-102721.png?direct&400}} {{:pasted:20181219-102721.png?direct&400}}
-  + 
 +{{:nodemcu_pins.png?direct&400|}} 
 + 
 +  ##wiring 
 +  ESP        DRV 8830 
 +  GPIO 4    |   SDA 
 +  GPIO 5    |   SCL 
 +  VIN     |   Vcc 
 +  GND     |   Gnd 
 + 
 +  * **connect to the ESP only with I2C pulled up with 3.3v.** 
 +  * Motor (+) and OUT1, motor (-) and OUT2 
 +  * A 1 nF (102) ceramic capacitor between + and - of the motor 
 +  * A resistance of 0.2 Ω between ISENSE and GND of the DRV 8830 
 +  * 0.1 μF (104) ceramic capacitor between VCC and GND of the DRV 8830 
 +  * A 10 kΩ resistor between SDA and 3.3 v 
 +  * A 10 kΩ resistor between SCL and 3.3 v 
 +  * 5 V output such as USB serial and VIN of ESP - WROOM - 02 board 
 +  * GND of USB serial etc. and GND of ESP - WROOM - 02 board 
 + 
 +==== code ==== 
 +<code> 
 + 
 +/* 
 +  TinyIdiot 
 +  tiytony esp8266 
 + 
 +  drv8830 code from https://jiwashin.blogspot.com/2016/09/drive-dc-motor-by-drv8830-and-esp8266.html 
 +  pdf > http://www.tij.co.jp/jp/lit/ds/symlink/drv8830.pdf 
   ##wiring   ##wiring
   ESP         DRV 8830   ESP         DRV 8830
Line 28: Line 58:
   * 5 V output such as USB serial and VIN of ESP - WROOM - 02 board   * 5 V output such as USB serial and VIN of ESP - WROOM - 02 board
   * GND of USB serial etc. and GND of ESP - WROOM - 02 board   * GND of USB serial etc. and GND of ESP - WROOM - 02 board
 +*/
 +
 +#include <Arduino.h>
 +#include <Wire.h>
 +
 +uint8_t readMotorStatus();
 +void resetMotorStatus();
 +void runMotor(int inVector);
 +void writeToDriver(byte inDirection, byte inVoltage);
 +void brakeMotor();
 +
 +const int kDrv8830Address = 0x64;
 +
 +const int kBitClear  = 0x80;
 +const int kBitILimit = 0x10;
 +const int kBitOTS    = 0x08;
 +const int kBitUVLO   = 0x04;
 +const int kBitOCP    = 0x02;
 +const int kBitFault  = 0x01;
 +
 +
 +//
 +//  Setup
 +//
 +
 +void setup() {
 +  Serial.begin(115200);
 +  Wire.begin();
 +}
 +
 +
 +//
 +//  Loop
 +//
 +
 +float r = 0;
 +
 +void loop() {
 +  //
 +  //  Motor
 +  float s = sin(r) * 64.0;
 +  r += 0.1;
 +  if (r > 6.28) r = 0.0;
 +
 +  int out = (s > 0) ? 0x01 : 0x02;
 +  int speed = s;
 +
 +  runMotor(speed);
 +
 +  int status = readMotorStatus();
 +  if (status & kBitFault) {
 +    Serial.print("Motor Fault : ");
 +    Serial.println(status, HEX);
 +    resetMotorStatus();
 +  }
 +  
 +  delay(100);
 +}
 +
 +
 +//
 +//  DRV8830 Controll
 +//
 +uint8_t readMotorStatus() {
 +  uint8_t result = 0x00;
 +    
 +  Wire.beginTransmission(kDrv8830Address);
 +  Wire.write(0x01); //  read register 0x01
 +  Wire.endTransmission();
 +
 +  Wire.requestFrom(kDrv8830Address, 1);
 +  if (Wire.available()) {
 +    result = Wire.read();
 +  } else {
 +    Serial.println("No status data");
 +  }
 +
 +  return result;
 +}
 +
 +void resetMotorStatus() {
 +  Wire.beginTransmission(kDrv8830Address);
 +  Wire.write(0x01); //  fault
 +  Wire.write(0x80);  // clear
 +  Wire.endTransmission(true);
 +}
 +
 +
 +void runMotor(int inVector) {
 +  int direction;
 +  int voltage;
 +
 +  if (inVector > 0) {
 +    direction = 0x01;
 +    voltage = inVector;
 +  } else if (inVector == 0) {
 +    direction = 0x00;
 +    voltage = 0;
 +  } else {
 +    direction = 0x02;
 +    voltage = -inVector;
 +  }
 +
 +  writeToDriver(direction, voltage);
 +}
 +
 +void brakeMotor() {
 +  writeToDriver(0x03, 0x00);
 +}
 +
 +
 +void writeToDriver(byte inDirection, byte inVoltage) {
 +  if (inVoltage <= 0x05) inVoltage = 0x06;  // minimum voltage value is 0x06.
 +  
 +  int outData = (inVoltage & 0x3f) << 2 | (inDirection & 0x03);
 +  Wire.beginTransmission(kDrv8830Address);
 +  Wire.write(0x00); //  control
 +  Wire.write(outData);  //
 +  Wire.endTransmission(true);
 +
 +  delay(12);
 +}
 +</code>